1<html lang="en"> 2<head> 3<title>Invoking G++ - Using the GNU Compiler Collection (GCC)</title> 4<meta http-equiv="Content-Type" content="text/html"> 5<meta name="description" content="Using the GNU Compiler Collection (GCC)"> 6<meta name="generator" content="makeinfo 4.13"> 7<link title="Top" rel="start" href="index.html#Top"> 8<link rel="up" href="Invoking-GCC.html#Invoking-GCC" title="Invoking GCC"> 9<link rel="prev" href="Overall-Options.html#Overall-Options" title="Overall Options"> 10<link rel="next" href="C-Dialect-Options.html#C-Dialect-Options" title="C Dialect Options"> 11<link href="http://www.gnu.org/software/texinfo/" rel="generator-home" title="Texinfo Homepage"> 12<!-- 13Copyright (C) 1988, 1989, 1992, 1993, 1994, 1995, 1996, 1997, 141998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 152010 Free Software Foundation, Inc. 16 17Permission is granted to copy, distribute and/or modify this document 18under the terms of the GNU Free Documentation License, Version 1.3 or 19any later version published by the Free Software Foundation; with the 20Invariant Sections being ``Funding Free Software'', the Front-Cover 21Texts being (a) (see below), and with the Back-Cover Texts being (b) 22(see below). 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GCC recognizes 66files with these names and compiles them as C++ programs even if you 67call the compiler the same way as for compiling C programs (usually 68with the name <samp><span class="command">gcc</span></samp>). 69 70 <p><a name="index-g_002b_002b-92"></a><a name="index-c_002b_002b-93"></a>However, the use of <samp><span class="command">gcc</span></samp> does not add the C++ library. 71<samp><span class="command">g++</span></samp> is a program that calls GCC and treats ‘<samp><span class="samp">.c</span></samp>’, 72‘<samp><span class="samp">.h</span></samp>’ and ‘<samp><span class="samp">.i</span></samp>’ files as C++ source files instead of C source 73files unless <samp><span class="option">-x</span></samp> is used, and automatically specifies linking 74against the C++ library. This program is also useful when 75precompiling a C header file with a ‘<samp><span class="samp">.h</span></samp>’ extension for use in C++ 76compilations. On many systems, <samp><span class="command">g++</span></samp> is also installed with 77the name <samp><span class="command">c++</span></samp>. 78 79 <p><a name="index-invoking-_0040command_007bg_002b_002b_007d-94"></a>When you compile C++ programs, you may specify many of the same 80command-line options that you use for compiling programs in any 81language; or command-line options meaningful for C and related 82languages; or options that are meaningful only for C++ programs. 83See <a href="C-Dialect-Options.html#C-Dialect-Options">Options Controlling C Dialect</a>, for 84explanations of options for languages related to C. 85See <a href="C_002b_002b-Dialect-Options.html#C_002b_002b-Dialect-Options">Options Controlling C++ Dialect</a>, for 86explanations of options that are meaningful only for C++ programs. 87 88 </body></html> 89 90